| Basics: How to win in 80 days | Klingenmeister | Basics of building, troops, and infected. Zombie behavior, detailed timeline, zombie village, defense design, final wave, and misc. |
| A step by step guide to survival | Tynendir | Aimed at beginners who struggle to finish the first map. |
| The hitchhiker's guide to a good start | EndangeredTurtoise | Unit movement, build order, early game |
| Mini TAB Guide | LedgeEndDairy | Patrolling, noise, hard pushing |
| General Strategy guide Pt1, Pt2, Pt3 | Nami | Scouting, economy, first wave, mid-game, final wave |
| They Are Billions 800% Guide | Jonathan Berger | Map selection, unit movement, each hour strategy, timeline, troubleshooting/FAQ. |
| 800% Ultimate Campaign Guide | akashnil/uednva | Campaign 800% Difficulty Walkthrough, with Technology Tree purchases |
| Campaign Fully Revealed Colony Mission Maps | ledoucheX | Fully Revealed Maps on 800% Difficulty for all 23 Colony Missions |
| They Are Billions - Guide for beginners | Walkthrough | Mortal | This guide can show you step by step how to build a good economy, and how to make the most value of everything you do. |